improve error reporting when config toml file fails to parse (still a bit meh)

src/main.rs

@@ -381,7 +381,10 @@ async fn load_config_file(config: Config) -> Result<Config, AnyError> {
         Some(path) => {
             debug!(?path, "loading config file");
             let toml = tokio::fs::read_to_string(&path).await?;
-            let config: Config = toml::from_str(&toml)?;
+            let config: Config = match toml::from_str(&toml) {
+                Ok(c) => c,
+                Err(e) => panic!("\nfatal error: parsing config file at {} failed:\n\n{}\n\n", path.display(), e),
+            };
             Ok(config)
         }